ZFS replication backup script from FreeNAS to Amazon s3

freenas_s3_backup.sh

#!/bin/sh

# The first argument should be the name of the dataset to backup
if test -z $1; then
  echo "Please specify a valid dataset"
  exit 1
fi

# Passphrase file
passphrase_file=/root/snapshot-gpg-passphrase

# Local directory to syn with Amazon S3 
bucket_dir=/root/s3_sync_bucket

# The S3 bucket url
s3_bucket="s3://your-bucket/"

# Generate a snapshot name
snapshot_name="$1@$(date +%Y-%m-%d)"

# Convert to valid filename
filename=$(echo $snapshot_name | sed "s/\//-/g").gpg

echo "Using bucket_dir: $bucket_dir"
echo "Using s3 bucket: $s3_bucket"
echo "Using snapshot_name: $snapshot_name"
echo "Using filename: $filename"

# Create the snapshot, send it to the jail, encrypt it 
zfs snapshot $snapshot_name
zfs send -v $snapshot_name | jexec backup gpg --batch --symmetric --cipher-algo AES256 --passphrase-file $passphrase_file --output $bucket_dir/$filename
zfs destroy $snapshot_name

# Remove old snapshots
search_word=$(echo $filename | sed "s/@.*$//g")
echo "Searching for \"$search_word\" in $bucket_dir older than 7 days"
jexec backup find $bucket_dir -name $search_word* -mtime +7 -exec rm {} \;

# Sync to s3
jexec backup s3cmd sync --delete-removed $bucket_dir $s3_bucket